Configuring BGP4

•If you add a parameter to a peer group that already contains neighbors, the parameter value is applied to neighbors that do not already have the parameter explicitly set. If a neighbor has the parameter explicitly set, the explicitly set value overrides the value you set for the peer group.

•If you remove the setting for a parameter from a peer group, the value for that parameter changes to the default value for all the neighbors in the peer group that do not have that parameter individually set.

Configuring a Peer Group

To configure a BGP4 peer group, use either of the following methods.

USING THE CLI

To configure a peer group, enter commands such as the following at the BGP configuration level:

HP9300(config-bgp-router)# neighbor PeerGroup1 peer-group HP9300(config-bgp-router)# neighbor PeerGroup1 description “EastCoast Neighbors” HP9300(config-bgp-router)# neighbor PeerGroup1 remote-as 100 HP9300(config-bgp-router)# neighbor PeerGroup1 distribute-list out 1

The commands in this example configure a peer group called “PeerGroup1” and set the following parameters for the peer group:

•A description, “EastCoast Neighbors”

•A remote AS number, 100

•A distribute list for outbound traffic

The software applies these parameters to each neighbor you add to the peer group. You can override the description parameter for individual neighbors. If you set the description parameter for an individual neighbor, the description overrides the description configured for the peer group. However, you cannot override the remote AS and distribute list parameters for individual neighbors. Since these parameters control outbound traffic, the parameters must have the same values for all neighbors within the peer group.

Syntax: neighbor <peer-group-name> peer-group

The <peer-group-name> parameter specifies the name of the group and can be up to 80 characters long. The name can contain special characters and internal blanks. If you use internal blanks, you must use quotation marks around the name. For example, the command neighbor “My Three Peers” peer-groupis valid, but the command neighbor My Three Peers peer-groupis not valid.

Syntax: [no] neighbor <ip-addr> <peer-group-name> [advertisement-interval <num>] [default-originate [route-map <map-name>]] [description <string>]

[distribute-list in out <num,num,...> <acl-num> in out] [ebgp-multihop [<num>]]

[filter-list in out <num,num,...> <acl-num> in out weight] [maximum-prefix <num>] [next-hop-self]

[password <string>] [prefix-list <string>] [remote-as <as-number>] [remove-private-as] [route-map in out <map-name>] [route-reflector-client]

[send-community] [shutdown] [timers keep-alive <num> hold-time <num>] [update-source loopback <num>] [weight <num>]

The <ip-addr> <peer-group-name> parameter indicates whether you are configuring a peer group or an individual neighbor. You can specify a peer group name or IP address with the neighbor command. If you specify a peer group name, you are configuring a peer group. If you specify a neighbor’s IP address, you are configuring that individual neighbor. Use the <ip-addr> parameter if you are configuring an individual neighbor instead of a peer group. See “Adding BGP4 Neighbors” on page 10-14.

The remaining parameters are the same ones supported for individual neighbors. See “Adding BGP4 Neighbors” on page 10-14.

USING THE WEB MANAGEMENT INTERFACE

You cannot configure peer group parameters using the Web management interface.

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